反应详情

温度

200 °C

1-((2S,4R)-4-amino-6-bromo-2-methyl-3,4-dihydroquinolin-1(2H)-yl)ethanone (for a preparation, see Intermediate 1) (50 mg, 0.177 mmol), 5-chloropyrazine-2-carbonitrile (37.0 mg, 0.265 mmol) and DIPEA (0.123 mL, 0.706 mmol) were combined in NMP (1.5 mL) and heated in a sealed flask under microwave irradiation to 200° C. for 1 h. The mixture was partitioned between water (150 mL) and EtOAc (4×100 mL). The organic layers were combined, washed with brine (2×100 mL), dried by passing through a hydrophobic frit, and concentrated in vacuo. The resulting residue was purified by chromatography (25 g column, EtOAc/cyclohexane gradient) to give 5-(((2S,4R)-1-acetyl-6-bromo-2-methyl-1,2,3,4-tetrahydroquinolin-4-yl)amino)pyrazine-2-carbonitrile (61 mg, 0.158 mmol, 89% yield) as a brown gum.

1. customThe mixture was partitioned between water (150 mL) and EtOAc (4×100 mL)
2. washwashed with brine (2×100 mL)
3. customdried
4. concentrationconcentrated in vacuo
5. customThe resulting residue was purified by chromatography (25 g column, EtOAc/cyclohexane gradient)